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balandron [24]
3 years ago
10

Calculate the concentration (in mol/l) of 33% by weight (33 g naoh per 100 g of solution) naoh solution. (the density of the 33%

by weight solution is 1.35 g/ml).
Chemistry
1 answer:
Shtirlitz [24]3 years ago
7 0
Molarity is measured in moles per Liter. If there are 1.35 g/mL, find out how many grams there are in a liter of solution.

If there are 1000 mL in one liter, we can multiply by 1000 to get g/L

1.35 g/mL x 1 Liter/1000 mL = 1350 g per Liter of solution

By weight, the NaOH is 33% or .33

1350 g x .33 = 445.5 g of NaOH

Molar mass of NaOH is 39.997 g

445.5 g  x 1 mol NaOH/39.997 g = 11.13833538 moles per Liter

Rounded to significant figures, the answer is 11 mol/L NaOH


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<span>1. Use these definitions:
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<span>ii) Potential energy (PE) is a stored energy. You notice the PE once it is transformed into another form of energy, for example into kinetic energy or heat, or light. The maing forms of potential energy are gravitational potential energy (mgh), elastic potential energy (1/2)kx², and chemical potential energy.
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</span><span>2) Answers
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</span><span>2. An archer with his bow drawn : P
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The bow will have elastic potential energy in virtue of which the arrow will be throwm as soon as the archer release it.


3. A volleyball player spiking a ball K


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<span>5. The chemical bonds in sugar: P
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6. The wind blowing over a tree: K
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